CATHERINE SEO MD
NPI 1265690135
Emergency Medicine in Monterey, CA
About Catherine Seo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE SEO MD (NPI 1265690135) is an individual emergency medicine provider in Monterey, California, licensed in California (A138671) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS and is a graduate of Johns Hopkins University School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Catherine Seo Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Catherine Seo reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Monterey, CA 93940
- Reassigned Medicare billing, California enrollment
- 245 clinicians in this Medicare group
Monterey, CA 93940
- Reassigned Medicare billing, California enrollment
- 51 clinicians in this Medicare group
Salinas, CA 93906
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93940 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MONTEREY, CA 93940
MONTEREY, CA 93940
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Catherine Seo's NPI number?
The NPI number for Catherine Seo is 1265690135. It was assigned to this individual provider in the NPPES registry on May 28, 2008.
Where is Catherine Seo located?
Catherine Seo practices at 23625 Holman Hwy, Monterey, CA 93940. The listed phone number is (831) 625-4945.
What is Catherine Seo's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Catherine Seo enrolled in Medicare?
Yes. Catherine Seo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Catherine Seo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Seo reassigns Medicare benefits to 3 organizations: Community Hospital Of The Monterey Peninsula (Monterey, CA), Monterey Bay Observation Medicine (Monterey, CA) and Cep America - California (Salinas, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Catherine Seo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Catherine Seo was last updated on December 15, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Catherine Seo, MD · NPI 1265690135
Emergency Medicine physician in Monterey, California. Individual provider, active in the CMS NPPES registry since May 28, 2008.
## Identity
- **NPI:** 1265690135 (Entity type: Individual)
- **Enumerated:** May 28, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A138671 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 23625 HOLMAN HWY, Monterey, CA 93940-5902
- **Phone:** (831) 625-4945
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Community Hospital Of The Monterey Peninsula (NPI 1225285810, Monterey, CA); Monterey Bay Observation Medicine (NPI 1205225505, Monterey, CA); Cep America - California (NPI 1649226077, Salinas, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** December 15, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1265690135) · Data from the CMS NPPES public registry.